Person: TURHAN, AHMET
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TURHAN
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AHMET
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Publication Interactive effects of boron stress and mycorrhizal (AMF) treatments on tomato growth, yield, leaf chlorophyll and boron accumulation, and fruit characteristics(Taylor, 2020-10-19) Turhan, Ahmet; TURHAN, AHMET; Mustafakemalpaşa Meslek Yüksekokulu; Bitkisel ve Hayvansal Üretim Bölümü; 0000-0002-1976-8082; AAG-5889-2021High levels of boron (B) in soils cause toxicity in tomatoes, but inoculation of arbuscular mycorrhizal fungi (AMF) into plants can reduce it. This study aimed to evaluate the effects of AMF inoculation on morphological parameters (shoot height, plant fresh and dry weights), yield, leaf chlorophyll and boron content, and fruit characteristics (weight, water and soluble solid contents, firmness, color) of tomato plants grown in boron stress (0.06, 0.5, 1.0, 2.0, 4.0, and 8.0 mM). Increased boron concentrations reduced all parameters except leaf boron content, fruit soluble solids and firmness. However, the highest values of the morphological parameters, fruit soluble solid contents and red color values (control, 0.5 and 1.0 mM B), fruit yield (<8.0 mM B), leaf chlorophyll content (<= 2.0 mM B), fruit weight (control, 0.5 and 2.0 mM B), fruit firmness (control and 1.0 mM B) were obtained from mycorrhizal plants. No significant differences were found between the fruit water content and color values (brightness and yellow) of non-mycorrhizal and mycorrhizal plants in all boron stress levels. The leaf boron concentration in inoculated with mycorrhizal fungi had lower than non-inoculated ones. These results suggest that mycorrhizal-inoculation may limit excessive boron uptake and alternatively be used in boron contaminated soils.Publication Effects of chemical and organic fertilizer treatments on yield and quality traits of industrial tomato(Namik Kemal Üniversitesi, 2021-05-01) Turhan, Ahmet; Özmen, Neşe; TURHAN, AHMET; ÖZMEN, NEŞE; Mustafakemalpaşa Meslek Yüksekokulu; Gıda İşleme Bölümü; 0000-0002-1976-8082; AAG-5956-2021; AAG-5889-2021Increasing plant production by protecting the environment is one of the main goals of today's agriculture. On the other hand, the use of both inorganic and organic fertilizers is becoming increasingly extensive. This study was carried out in field conditions to determine the effects of organic and inorganic fertilization on yield and quality characteristics of industrial tomato (Solanum lycopersicum L., cv. Heinz 1015 F-1). For this purpose, contents of fruit total soluble solid contents, total dry matter, titratable acidity, lycopene, total carotenoids, and vitamin C contents and yield (marketable yield and paste yield) were determined. Experiments were conducted in randomized blocks design with 3 replications. There were seven experimental treatments as of control (without fertilizer), chemical fertilizer, organic farmyard manure, sheep manure, poultry manure, vermicompost and leonardite. According to the research results, the highest marketable and tomato paste yield were obtained from chemical fertilizer, followed by organic fertilizers and the lowest values were obtained from the control. As compared to chemical fertilizers, organic fertilizers influenced fruit quality attributes more positively. The highest lycopene, total carotenoid and vitamin C contents were obtained from organic fertilizers, especially from poultry manure. Fruit soluble solids and dry matter contents, important processing traits assumed by tomato industry, were obtained from poultry manure treatments. Fruits from leonardite-treated plants had considerably higher titratable acidity levels. Except for total dry matter and titratable acidity, lowest values of quality parameters considered important in industrial tomatoes were obtained from unfertilized (control) plots. Present findings revealed that chemical fertilizers were essential for high and economic yield levels in tomato farming, but organic fertilizers should also be supplemented to improve tomato fruit quality attributes.Publication Improvement of root yield and ion content of carrot with exogenous application calcium under salinity(Springer, 2022-12-13) Turhan, Ahmet; Kuşcu, Hayrettin; TURHAN, AHMET; KUŞÇU, HAYRETTİN; Mustafakemalpasa Meslek Yüksekokulu; Biyosistem Mühendisliği Bölümü; 0000-0002-1976-8082; 0000-0001-9600-7685; AAH-4682-2021; AAG-5889-2021Effects of saline irrigation waters on carrot root yield and leaf nutrient accumulations and the potential role of supplementary calcium treatments in alleviating the harmful effects of saline irrigation waters were investigated. Experiments were conducted in a fully randomized-factorial experimental design with four replications. Carrot plants were subjected to 5 different NaCl (control, 20, 40, 60 and 80 mM) concentrations and 3 different supplementary Ca (0, 4 and 8 mM) treatments. Carrot root yields significantly decreased with increasing irrigation water salinity levels. Increasing irrigation water salinity levels reduced leaf macro and micronutrients and increased leaf Na and Cl contents. Supplementary Ca treatments increased root yields and leaf K, Ca, and P contents. Positive effects of supplementary Ca treatments were generally observed at low and moderate (& LE; 60 mM) salinity levels. Supplementary Ca treatments did not positively affect leaf Cl, Mg, Fe, Mn, Cu, and B contents. Reduced leaf Na content with supplementary Ca treatments is a remarkable outcome for the salt tolerance of the plants. Present findings revealed that supplementary Ca treatments could be used to improve crop performance in the case of low and moderate salinity levels in irrigation waters.Publication Influence of chloride on growth, fruit yield and quality parameters of processing pepper(Kahramanmaras Sutcu Imam Univ Rektorlugu, 2021-01-01) Turhan, Ahmet; Özmen, Neşe; TURHAN, AHMET; ÖZMEN, NEŞE; Mustafakemalpaşa Meslek Yüksekokulu; 0000-0002-1976-8082This study was carried out to investigate the effects of irrigation water containing different Cl- on plant growth parameters, fruit yield and quality characteristics of pepper (C. annuum L. cv. Postal Capija). Nutrient solutions containing Cl- concentrations were applied to processing pepper plants and effects of Cl- on growth parameters, fruit yield and quality traits, leaf water potential and chloride contents were determined. Greenhouse experiments were conducted with the Cl- concentrations [control (0.27), 1.5, 3.0, 4.5, 6.0, 7.5 and 15.0 mM] were applied to pepper plants. Plant height, fresh and dry weight, fruit yield and fruit weight, length and diameter were not affected by increasing Cl- concentrations up to 3.0 mM, but further increases in Cl- concentration negatively influenced this results. The greatest dry matter and soluble solids content were obtained from 3.0 and 4.5 mM Cl- treatments. Increasing Cl- concentration increased fruit acid content; the greatest acid content was from the greatest Cl- concentration. Increasing growing media Cl- concentration increased leaf Cl- accumulation and Cl- concentration >3.0 mM reduced leaf water potential. Research results showed that Cl- concentrations in irrigation water are important for efficient and economical pepper cultivation, and using water containing more than 3.0 mM chlorine will jeopardize yield and quality.Publication Response of red pepper (Capsicum annuum L.) to foliar applications of zinc(Taylor, 2021-02-21) Turhan, Ahmet; Kuşçu, Hayrettin; Özmen, Neşe; TURHAN, AHMET; KUŞÇU, HAYRETTİN; ÖZMEN, NEŞE; Mustafakemalpaşa Meslek Yüksekokulu; Gıda İşleme Bölümü; 0000-0002-1976-8082; 0000-0001-9600-7685; AAH-4682-2021; AAG-5889-2021; AAG-5956-2021An open-field study considering the responses of red pepper plants to foliar applications of zinc (Zn) was conducted with the aim to understand its effect on fresh fruit yield (FFY) and paste yield (PY), and some physical and quality properties of the fruits. Four different doses of Zn (control 0.0%, 0.05%, 0.10% and 0.20%) were applied from the plant leaves as zinc sulfate (ZnSO4.7H(2)O). The effect of Zn applications on plant height (PH) and crop canopy percentage (CCP) was in a positive direction. The longest plants were obtained from 0.10% Zn application. Treatments of 0.10% and 0.20% Zn positively affected the weight (FW), diameter (FD) and height (FH) of pepper fruits, significantly increased compared to control. The highest FFYs were obtained from 0.10% and 0.20% Zn applied plants. PY increased 33% in response to 0.10% Zn treatment when compared with control. The highest fruit dry matter (DM) was obtained from both applications (0.10% and 0.20% Zn), while the highest soluble solids content (SSC) was determined at 0.20% Zn application. These results indicate that foliar application of Zn could be considered for red pepper cultivation to improve plant development, yields and some quality properties, particularly in regions where Zn insufficiently is high.Publication The influence of irrigation strategies on tomato fruit yield and leaf nutrient contents(Springer, 2022-05-17) Turhan, Ahmet; Kuşcu, Hayrettin; Aşık, Bülent Barış; TURHAN, AHMET; KUŞÇU, HAYRETTİN; AŞIK, BARIŞ BÜLENT; Mustafakemalpasa Meslek Yüksekokulu; Bitkisel ve Hayvansal Üretim Bölümü; 0000-0002-1976-8082; 0000-0001-9600-7685; AAH-4682-2021; AAG-5889-2021; CEI-5442-2022In order to assess the effect of deficit irrigation (DI) on fruit yield and leaf nutrient contents of tomatoes in the Mediterranean climate, an open-field experiment was carried out in Bursa, Western Turkey. Experiments were conducted in randomized complete block design with three replications. Five irrigation treatments (IT) were studied: 100% (IT1, control), 75% (IT2) or 50% (IT3) evapotranspiration throughout the entire irrigation season; 100% of IT1 during the first half of the irrigation season (during 45 days from plantation) and 75% (IT3) or 50% (IT4) of IT1 during the second half of the irrigation season (about 45 days). The greatest fruit yield was obtained from IT1 treatment and significant decreases were observed in fruit yields with increasing water deficits. As compared to the control, IT4 treatment offered about 15% saving in irrigation water and a low level of reduction in yield (2.11%). Relatively high irrigation water productivity and water productivity values were obtained from IT2 and IT4 treatments. Effects of DI on water potential are also reflected in leaf nutrients. Reductions in water uptake resulted in reduced nutrient uptakes. The greatest leaf nutrient contents were observed in the IT4 treatment. Except for Mn and Cu, significant decreases in leaf nutrients with increasing water deficits were observed.Publication The effect of saline water application on tomato fruit yield and some quality parameters(Parlar Scientific Publications (P S P), 2020-01-01) Turhan, Ahmet; TURHAN, AHMET; Mustafakemalpaşa; Meslek Yüksekokulu,; Bitkisel ve Hayvansal Üretim Bölümü; 0000-0002-1976-8082; AAG-5889-2021This study was carried out to determine the effect of different salt concentrations on the yield and fruit quality of industrial tomato (Lycopersicon esculentum L.). The study was conducted using the randomized parcel design under greenhouse conditions with 4 replicates, 3 pots per replicate. The results of this study showed that salinity levels above 2.6 dS m(-1) significantly reduced marketable yield and paste yield. In the tomato fruits, the soluble solids content and total sugar content significantly increased at 6.6 dS m(-1), the water content and lycopene content significantly increased at 4.6 dS m(-1), and these values all decreased significantly when the salinity exceeded the a aforementioned levels. There was a positive relationship between the total acid contents of the fruit and the salinity, and the total acid values of the fruit increased as the salt concentrations increased. This study revealed that industrial tomatoes could be grown in salinity up to 2.6 dS m(-1) without any decrease in yield. However, the results also showed that some desirable fruit quality properties of the industrial tomatoes (soluble solids content, total sugars and acids, and lycopene) could be improved by increasing soil salinity by a fair amount (6.6 dS m(-1)).Publication The role of humic acid application in reducing detrimental effects of salt in cauliflower (Brassica Oleraceae L. Var. Botrytis)(Kahramanmaraş Sütçü İmam Üniversitesi Rektörlüğü, 2019-01-01) Turhan, Ahmet; TURHAN, AHMET; Mustafa Kemal Paşa Meslek Yüksekokulu; Bitkisel ve Hayvansal Üretim Bölümü; 0000-0002-1976-8082; AAG-5889-2021This study was conducted to determine effects of Humic Acid (HA) on yield and some quality characteristics of cauliflower under saline conditions. Control (0.3). 2, 4, 6, and 8 dS.m(-1) NaCl and 0, 1 and 2 g.kg . (1)HA combinations were applied to the growth medium. Salt application generally negatively affected yield and curd growth, and negative effects were mostly due to salt concentrations >2 dS.m(-1). Increasing salt concentration positively affected quality characteristics of curds, and the highest total acid contents of dry matter and total soluble solids were detected in salt concentrations of 6-8 dS.m(-1). The HA application tOr decreasing harmful effect s of salt brought to a successful conclusion in terms of total yield notably, and curd diameter and length, and the total amount of dry matter. While positive effects occurred mostly at salt concentrations >= 4 dS.m(-1); effects of HA application did not occur at NaC1 concentration of 6 or 8 dS.m(-1). Two g.kg(-1) HA produced better results for yield and curd weight, but application of 1 or 2 g.kg(-1) ILA produced similar effects for other parameters.